Missing `-or-` in `for-range-initializer`

[kmyk]

The current version says for-range-initializer is a concatenation of expression and braced-init-list.

for-range-initializer:
    expression braced-init-list     C++0x

However, it seems the disjunction is correct instead of concatenation.

• https://www.nongnu.org/hcb/#for-range-initializer
• https://eel.is/c++draft/stmt.iter#nt:for-range-initializer

[alx71hub]

Fixed